Emergency warning light base



FIG. 1 is a front elevational view of an emergency warning light base showing our new design, with the broken line showing for illustrative purposes only and forming no part of the claimed design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a right-side elevational view thereof;

FIG. 4 is a left-side elevational view thereof;

FIG. 5 is a bottom plan view thereof; and,

FIG. 6 is a top plan view thereof. 

The ornamental design for an emergency warning light base, as shown and described. 